It just depends. Since she wants to be Hokage, Naruto would be a better role model for her than her dad. Boruto wants to travel the world like Sasuke so Sasuke is a better role model for him. I wouldn't say Naruto is a better father though. They both seem kind of neglectful of their kids. Not that it's their fault. As the 2 most powerful beings on the planet they have some very worldly matters to attend to which keeps them occupied.
EDIT: I think it's cool that Naruto and Sasuke's Kids look up to their "Uncles" I get the feeling Sarada will end up as Naruto's pupil. Also what's that anime on your sig? Looks dope